Dynamometer.



I F. HARRISON.

I DYNAMOMETER.

APPLICATION FILED MAR. 11. 1

1 Q35 7()'Q 912' Patented Aug. 13, 1912.

2 SHEE SSHEET 1.

EA ENVENTOR Hart "draw WITNESESES F. HARRISON;

DYNAMOMETEB. APPLIGATION FILED MAR. 11, 1912 Patented Aug. 13,1912.

2 SHEETSSHEET 2.

crate them simultaneously by a screw the.

UNITED smi es Parana ora ion.

FRED HARRISON, OF WORCESTER, ENGLAHD.

. nvnamemsrnn.

Specification 0 mama To alien-howl) it may concern Best known that I, FRED HAnmsoN, a British subject, residing at Worcester,

county of Worcester, England, have invent ed certain new and useful Improvements in Dynamometers, ofwhich the following is a specification.

This invention relates to improvements in the valve gear for rotary absorption dynamometers in which a turbine or rotor revolves within a casing suitably mounted on friction rollers and connected to a water supply to enable the casing to run full of water when the machine is in use.

I It has been proposed to connect the inlet and outlet valve levers by links and to opmovement of which isvery slow.

ilhis invention is designed to provide a valve gear whereby the dynamometer may be employed for indicating horse powers considerably above or below its normal range on occasions when the prime moveris subjected suddenly to large overloads or underloads.

It consists in the arrangement of links and levers by which the inlet and outlet valves are operated by a single lever which can he quickly moved a considerable distance the movement of which, in one direction causes the inlet valve to be further opened and outlet valve closed'and its movement in the reverse direction causes the inlet valve to be closed and=outlet valve further opened.

Theinvention will be fully described with reference to the accompanying drawings ;Eorming part of the 's )ecification.

Figure 1 is a side elevation of a rotary absorption dynamometer with the invention applied thereto. Fig. 2 is a front elevation of same. I A lever in is mounted on the inlet valve M on the inlet pipe F and a quadrant shaped lever 71. is mounted on the outlet valve Ti and both these levers n and m. are 'nvotally connected at the ends to a ctnnectmg link t).

A. sp ndle p extending across the dynamom eter is carried lay-two l;racl cts l and l atiixed to the ced plate of the dynamomeier. An operating lever R is affixed to one end of the spindle ,1 and moves over a quadrant bracket S carried on the frame of the machine. This quadrant bracket S provided with a slot 8 in which a spring clip :1 on the operative lever B slides on any movef L ter Patent l atent-ed Aug 133 i912.

A lication fiiea March 11, 1912. Serial 1%. 683,946.

is moved to the desired position it will be held there. The lever w affixed to the outlet 'alve N is connected to the spindle,- 1 by the link O and the lever O mounted oh the spindle 7). The link t) and the lever are pivotally connected so that they can turn'ahout each other. The end 0 of the link 6 attached to the lever n, is pivotally mounted on a threaded rod a. carried by this lever 12 so that its distance from the spindle of the outlet valve N can be varied. A weight '1 is attached by the arms 4 and I." to the stator on the opposite side of the dynamonieter to that on which the balance arm E and weight \V are placed and the weight T is arranged to balance the spring balances V and V for measuring the under and over load and the sliding weight w when the latter is in the Zero position on the arm 11.

When the operating lever It is held in its central position on the quadrant S (as shown in Fig. 1) the valves M and I; are arranged to open and close normally so that if the machine is being used for a test it records in the usual way the power absorbed thereby. When it is desired to put on an overload the operating lever It is moved upward toward the end .9 of the quadrant S. This movement of the lever ll rotates the spindle p and with it the lever (l causing the link t) lever n, link 9 and lever in all to be moved. The 'ihovement of the lever causes the outlet valve X to he cl sed and that of the lever in causes the inlet valve -l to be opened, the amount of their respective closing and opening depending upon the extent of the movement cf the operating lever R. llhen on the other hand it is desired to reduce the load '2". 6., put on an under load the operating lever R is moved downward toward the end a of the quadrant S. This causes the shaft 7) to be rotated in the opposite direction so that the lever 12 and lever in also moved in the opposite direction and conse plcntly the inlet valve Bl is closed and the outlet valve N opened. The amount of their respective closing and opening depends upon the extent of the movement of the, operating lever R. The iamount of the overload is measured on the ,joverload spring balance V and ot' the under lload on the underload spring balance V l operated by the arm E.

ment of this lever so that when the lever between one 60 whereby What I claim as my invention and desire to protect by Letters Patent is 1. In a rotary absorption dynamometer, the combination, with a casing'having fluid 5 inlet and outlet pipescommunieating therewith, and a valve associated with each' of saidpipes; of an actuating lever connected to each valve; alink connection between said levers; a spindle; a' link connection of said levers and said spindle; and means for operating said spindle whereby said valves may he suddenly opened or closed when the dynamometer is employed for indicating powers (.fOHSltltl". ably above or below its normal range.

"2. In a rotary absorption dynan'iometer, the combination, with a casing having fluid inlet and outlet pipes communicating therewith, and a valve associated with each of said pipes; of an actuatil'ig lever connected to each valve; a link connection between said levers; a spindle; a lmk connection between one of said levers and said spindle;

' a slotted quadrai'it bracket associated with said s indie; and a hand lever atiixed to-said splnd e for operating the same,- whereby said valves may be suddenly opened or closed when the dynamometer is employed for lndlcating powers crmslderabl y above or below its normal range, said hand lever being movable across said bracket and provided with a retaining device operative in the slot therein. I

3. In a rotary absorption dynamometcr,

the combination, with a casing having fluid inlet and outlet pipes commnnicating there with, and a valve associated with each of said pipes; of an act hating lever connected to each valve; a link connection between said levers; a spindle; a threaded rod ad justably carried by one of said levers; a link connection between said rod and said spindle; and meansd'or operating said 3 indie, whereby said valves may be sudi only opened or closed when the dynan'iometer is employed for indicating powe ronsiderably above or below its normal range.v

i 4. In a rotary absorption dynarnometr-r, the combination. with a casing having fluid bi1llt and olltlctpi 'ies coinrnunicating there with, and a valve asso iated with each of said pipes;.of an actuating lever conn ted to each valve; a link'coi'mcction bet ween said levers; a spindle; a threaded rod adjustably carried by one of said levers: a link connection between said, rod and saidtpindle; a slotted quadrantbracket associated with said spindle; .and a hand lever affixed to said spindle for operatiru, the same, said valves may be sudd nly opened or closed when the dynarnomct -r employed for indicating powers considerably above or below its normal range, said hand lever being movable across said bracket and provided with a retaining device operative in the slot therein.

5. In a rotary absorption dynamometer, the combination, with a casing having fluid inlet and outlet pipes communicating therewith, and a valve associated with each of said pipes; of an actuating lever connected to each valve; a link pivotally connected at opposite ends to saidlevers; a spindle; a lever secured thereto; a link pivotally connected at opposite ends to the second-named lever and oneof the firstnamed levers; and means for operating said spindle whereby said valves maybe suddenly opened or closed when the dynamomet'er is employed for indicating powers considerably above or below its normal range.

lwIIl a rotary absorption dynamometer, the combination, with a asing having fluid inlet and outlet pipes communicating therewith, and a valve associated with each of inlet and outlet pipes eommnnicating therewith, and a valve associated Wllll each of.

said pipes: of an actuating lever connected to each valve; :1 link pivotallyconnected at opposite ends tojsaid levers: a threaded rod adjustahly carri dby one of said levers; a spindle; a lever secured thereto; a link pivotally connected at'opposite ends to said rod and thesecoodmamed lever; a slotted quadrant liracket associated with said spindle; and a hand lever afiixedto said spindle for operating the same. wl'iereby said valves may he suddenly opened or closed when the dy namono-tar is employed for indicating powers.r-onsiderably above .or below its nor mal range. said hand lever being movable i'd-ross said ln-a -ln-taml provided with a retaining dc 'ir-toperative in the slot therein.

In te timony: whereof I have hercunto set my hand'in presence of two subserilnng witnesses. v v

FRED HAHIRISUN.

\Vit ncsses:

, An'rut'n Jonx Dnnarrrr,

A [.Hl-Zlt'l llnwa an 13 t: humor. 

